That's not necessarily a big deal, especially for the top-left where the I/O plate helps hold it in place.

That's not necessarily a big deal, especially for the top-left where the I/O plate helps hold it in place.

−

However, note that with less stand-offs installed, you are bending the board more than usual when inserting CPUs, RAM, or other components. Such bending may damage the board! To prevent that, you can use plastic mainboard stand-offs [https://www.pccables.com/images/STANDOFFS-MOTHERBOARD-STANDARD-MB-PLASTIC-100-PACK.jpg like these] in places where proper stand-offs are missing. As an alternative, one can put a spare stand-off upside down into a screw hole from below, such that the outer thread is facing upwards, and then fixate it by screwing another stand-off on top of it.

+

However, note that with fewer stand-offs installed, you are bending the board more than usual when inserting CPUs, RAM, or other components. Such bending may damage the board! To prevent that, you can use plastic mainboard stand-offs [https://www.pccables.com/images/STANDOFFS-MOTHERBOARD-STANDARD-MB-PLASTIC-100-PACK.jpg like these] in places where proper stand-offs are missing. As an alternative, one can put a spare stand-off upside down into a screw hole from below, such that the outer thread is facing upwards, and then fixate it by screwing another stand-off on top of it.

Where is the installation manual online?

My motherboard bag's seal/labels are broken! Has it been compromised?

This is normal for now. (It may have been compromised still, but the broken labels don't indicate that.)

Mounting in case

Where do I get the stand-offs and screws?

They should come with your case. (Check inside drive bays and such.)

Should I use rubber spacers with the stand-offs?

Stand-offs are supposed to help ground the motherboard, so it's better not to.

My case doesn't have holes for some stand-offs!

That's not necessarily a big deal, especially for the top-left where the I/O plate helps hold it in place.

However, note that with fewer stand-offs installed, you are bending the board more than usual when inserting CPUs, RAM, or other components. Such bending may damage the board! To prevent that, you can use plastic mainboard stand-offs like these in places where proper stand-offs are missing. As an alternative, one can put a spare stand-off upside down into a screw hole from below, such that the outer thread is facing upwards, and then fixate it by screwing another stand-off on top of it.

CPU/HSF installation

How far should the HSF screw be tightened?

The screw has a hardstop; you turn until you can't.

What is an indium pad? Does the stock HSF include it?

Indium pads help heat transfer from the CPU to the HSF.
4-core and 8-core CPUs do not require them (and do not ship with them).
More powerful CPUs should ship with them if required (TBD whether pre-applied to the HSF, or separately).

Should thermal paste be used?

The use of thermal paste is not recommended under any circumstance. The heatsink is attached using an unusual high-pressure mounting system which places over 200lbs of force on the CPU module, making thermal paste unnecessary.

Optionally, an indium pad may be placed between the heatsink and the CPU heatspreader to enhance dissipation. Testing found this to make no difference to temperatures for 4-core and 8-core CPUs. An indium pad is included with 18 and 22-core CPUs and its use is recommended for those CPUs.

Should I remove the label/sticker from the HSF?

No.
Do not remove the label/sticker, or you will void the warranty of the HSF.

Can I use 4mm hex driver?

Yes, 5/32" = 3.97 mm.

Removing the HSF from a CPU with an indium pad

The heat emitted during the operation of the CPU may cause the indium pad to stick to the HSF and the CPU. If the HSF is removed, there is a possibility that the CPU and HSF may stick together, only to separate once the HSF has been partially removed. This could cause the CPU to fall downwards (onto the socket) at an angle, which may damage the socket. For this reason, excercise extreme caution when removing the HSF from a CPU with an indium pad which has been run at load.

Front panel I/O

Which is the other side of the buttons?

Typically ground, though there is nothing mandating this in the general case. ATX case switches normally short out two adjacent pins when depressed.

FIXME: Confirm this is the case for Talos specifically.

Are the LED "cathode" pins the plus or minus side?

Minus.

What should the plus side of the LED be connected to?

The associated Anode pin.

Purpose

-

+

Fan fail

6

8

NIC 2

10

9

NIC 1

12

11

HD*

14

15

Power

16

15

What does the Identify button do?

Turns on and off the Identify LEDs. This is mainly useful in server farms, as the ID LED status can be both read and set via software (IPMI). The main use is making sure that the correct server is unplugged, restarted, upgraded, etc. by datacenter staff.

What does the NMI button do?

As of this writing the NMI button is ignored by the BMC. It may be used to generate an NMI in future firmware revisions, or serve another purpose entirely.

The HD activity LED doesn't work!

The integrated Microsemi controller does not report activity (yet). A much-belated SAS controller firmware update from Microsemi is expected by 04/20/2018 to enable this functionality.

In the interim, J10115 can be connected to other hardware to control the HD activity LED.

What is OCC mode?

The On Chip Controller (OCC) is a clock / thermal management engine.

The OCC can enter a safe mode if external hardware detects a condition that would require power throttling. This feature is not active in firmware on Talos II, but the wiring required to support it is present for future expansion.

What are the effects of the "CPU secure mode disable" jumpers?

When secure mode is disabled, the on-board SBE will not halt IPL if the next stage (hostboot) fails security verification. When secure mode is enabled, each step of the IPL process verifies the next, and will halt IPL if a discrepancy (hash difference, invalid signature, etc.) is found. Talos II ships with secure mode disabled as of this writing.